Molecular signatures of transgenerational response to ocean acidification in a species of reef fish

Schunter, Celia, Welch, Megan J., Ryu, Taewoo, Zhang, Huoming, Berumen, Michael L., Nilsson, Goeran E., Munday, Philip L., and Ravasi, Timothy (2016) Molecular signatures of transgenerational response to ocean acidification in a species of reef fish. Nature Climate Change, 6 (11). pp. 1014-1018.

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Abstract

The impact of ocean acidification on marine ecosystems will depend on species capacity to adapt(1,2). Recent studies show that the behaviour of reef fishes is impaired at projected CO2 levels(3,4); however, individual variation exists that might promote adaptation. Here, we show a clear signature of parental sensitivity to high CO2 in the brain molecular phenotype of juvenile spiny damselfish, Acanthochromis polyacanthus, primarily driven by circadian rhythm genes. Offspring of CO2-tolerant and CO2-sensitive parents were reared at near-future CO2 (754 mu atm) or present-day control levels (414 mu atm). By integrating 33 brain transcriptomes and proteomes with a de novo assembled genome we investigate the molecular responses of the fish brain to increased CO2 and the expression of parental tolerance to high CO2 in the offspring molecular phenotype. Exposure to high CO2 resulted in differential regulation of 173 and 62 genes and 109 and 68 proteins in the tolerant and sensitive groups, respectively. Importantly, the majority of differences between offspring of tolerant and sensitive parents occurred in high CO2 conditions. This transgenerational molecular signature suggests that individual variation in CO2 sensitivity could facilitate adaptation of fish populations to ocean acidification.

Item ID: 47226
Item Type: Article (Research - C1)
ISSN: 1758-678X
Keywords: climate-change ecology; ecological genetics; marine biology; molecular ecology
Funders: Australian Research Council (ARC), Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies, King Abdullah University of Science and Technology (KAUST), University of Oslo
Projects and Grants: KAUST OCRF-2014-CRG3-621 40408
Research Data: https://www.ncbi.nlm.nih.gov/bioproject/311159
Date Deposited: 11 Jan 2017 07:37
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 40%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060303 Biological Adaptation @ 60%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960301 Climate Change Adaptation Measures @ 100%
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